<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <link rel="shortcut icon" href="./img/favicon.ico" type="image/x-icon">
  <title>cwind</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }


    #app {
      margin: 20px 0px
    }

    .box {
      margin: 20px 0px;
    }

    .demo {
      border: 1px solid red;
      min-height: 100px;
    }
  </style>
</head>

<body>
  <div id="app">
    
  </div>

</body>

</html>